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The DC screw terminals are supporting 8 to 48 VDC. The Micro USB port can be used to power the RAK7431, up
to 5 V / 500 mA DC. At the same time, the USB port is used as the configuration port for the device. Using the
USB cable to connect the RAK7431 to a computer’s USB port, you can import your configuration settings.
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NOTE
The Micro USB port can be used only for powering the device. It cannot provide power to VOUT and
power other devices in the RS485 network.
Figure 2: RAK7431 bridge with connected sensor and power supply
Data Interface Configuration
The RAK7431 - RS485 serial interface can support up to 16 RS485 devices. VOUT on the data interface can
supply external power to the RS485 connected devices (only when the device is powered from the DC input). The
VOUT output voltage is the same as the DC input voltage VIN.
Figure 3: RAK7431 Interface pin definition
Gateway Connection Settings
In this section, the RAK7431 WisNode Bridge Serial shall be connected into the RAKwireless Gateway. For this
demonstration, a RAK7249 WisGate Edge Max shall be used. Listed below are the requisites for this section.